一种用于生物指导放射治疗 (BgRT) 的新型PET-Linac投入使用
Murat Surucu1, Muhammad Ramish Ashraf1, Ignacio Omar Romero1
1Department of Radiation Oncology, Stanford University, Stanford, California, USA.
Medical physics
|May 4, 2024
概括
RefleXion X1系统有效地提供SCINTIX生物指导放射治疗 (BgRT),在静态测试中显示精确性和患者运动中的适应性,以提供准确的剂量.
科学领域:
- 辐射瘤学 辐射瘤学
- 医学物理 医学物理
- 核医学成像技术 核医学成像技术
背景情况:
- 生物指导放射治疗 (BgRT) 是一种使用瘤PET信号进行实时剂量指导的创新技术.
- 采用双PET弧的RefleXion X1系统是第一个提供SCINTIX BgRT的系统,该系统已获得FDA对骨和肺瘤的批准.
研究的目的:
- 为了评估SCINTIX BgRT系统对PET对比差异变化的灵敏度.
- 评估系统在治疗期间适应患者运动的能力.
- 为了确定系统在各种处方剂量的性能.
主要方法:
- 设计静态和动态实验场景,包括端到端测试,使用具有球形目标的自定义 ArcCHECK 插件.
- 模拟患者的呼吸,使用正弦和正弦^4的运动模式,以测试在运动中的BgRT输送.
- 使用活动度 (AC),规范目标信号 (NTS),生物跟踪区 (BTZ) bDVH通过率和马分析 (3%/2mm,3%/3mm) 评估性能.
主要成果:
- 静态测试显示精度AC>5kBq/mL,NTS>2,100%的bDVH通过率;马分析 (3%/2mm) >91.5%.
- 动态测试证明了与运动的适应性,达到> 87%的马通道率 (3%/3mm).
- 与封闭式SBRT进行比较显示93.9%的马射线通过率;步骤转移测试产生了60.3%的马射线通过率,而PTV剂量与计划一致 (99.9%).
结论:
- RefleXion X1系统在静态SCINTIX BgRT输送方面表现出良好的一致性,满足关键指标并输送计划剂量.
- 该系统在运动过程中表现出适应性,准确地将剂量定位到PET信号,并实现可接受的剂量分配.
更多相关视频
07:57Positron Emission Tomography-based Dose Painting Radiation Therapy in a Glioblastoma Rat Model using the Small Animal Radiation Research Platform
Published on: March 24, 2022
2.8K
06:20Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition
Published on: March 11, 2021
7.2K
相关概念视频
Radiological Investigation III: Pulmonary Angiogram and PET Scan
91
Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
91
Positron Emission Tomography
4.2K
Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
4.2K
